Shaving or cutting device



March 18, 1941. J. MUROS SHVING OR CUTTING DEVICE Filed June 26, 1940INVENTOR ATTORN Patented Mar. 18, 1941 snAvlNG on CUTTING nEvIcE JosephMuros, Cambridge, Mass., assignor to l' Gillette Safety Razor Company,Boston, Mass., a corporation of Delaware Application June 2s, 1940,serial No. 342,531 4 claims. (C1. sli-207)' This invention relates toshaving or cutting -devices employing concentric shaving members forremoving hair in concavities such as the nostrils or ears. The inventioncomprises a man- 5 ually operated dev-ice of this type improved instructure, eillciency and convenience of operation as compared 4tocutting devices heretofore available.

An important feature of the invention, contributing to simplicity ofstructure and compactness in design, consists in a pair oftelescopically arranged and relatively rotatable holding members in oneof which is mounted a stationary toothed cutter and in the A,other ofwhich is lli mounted the co-operating movable cutter. As

herein shown the outer tubular member serves as the housing for thedevice asa whole as well as the holder for the stationary cutter. Within:the housing thus provided is mounted a freely rotatable sleeve orthim-ble which serves as a carrier for the movable cutter. l y Therequired rotary shearing movement between the two cutters is provided bymechanism constituting another feature of the invention. As herein shownthe sleeve or thi-mble in which the inner cutter is mounted is providedwith a transverse slot in its bottom and in this is inserted the innerend of a plunger havin-g a spiral section therein. When, therefore, theVplunger is moved longitudinally its spiral section drives the rotarysleeve or holder in an oscillatory manner through an arc of any designedamplitude, for example approximately 90 as herein shown. A compressionspring housed within the body of the device is provided for holding theplunger normally in its outermost position and this may be operated ordepressed by the user in opposition to the compression spring forrotaizlng the inner cutter. 40 These and other features of the inventionwill be best understood and appreciated from the following descriptionof a preferred embodiment thereof, selected for purposes of illustrationand shown in the accompanying drawing, in which- Fig. l is an'end viewof the device;

Fig. 2 is a view in side elevation;

Fig. 3 is a sectional view on an enlargedscale showing the parts of thedevice intheir initial position: Fig. 4 is a plan view partly in sectionon the lined-lof Flg.3; and

Fig. 5f is a view in elevation like Fig. 3 except that i-t shows theplunger in its inner or elevated 11081121011- As already intimated thedevice comprises an outer tubular member I0 iluted for ornamentation onits sides and reduced at a bevel at its upper end. Pressed into the topof the body I0 is a'stationary tubular cutter I2 provided in its upperedge with a series of longitudinal slots 5 forming teeth with shearingedges. The stationary cutter as is apparent from Figs. 3 and 5 'projectssubstantially beyond the end of the tubular member I0. The lower edge ofthe stationary cutter I2 forms an annular shoulder with- 10 in thecasing I0. Below this shoulder is 4rotat- -ably mounted a -thimble I3embracing within its .upper portion the rotatable or oscillatory tubularcut/ter I4 also slotted in its lupper edge to por vide shearing teeth. l10 The lower wall or bottom of the thimble I3 is provided with astraight transverse slot I5 extending across the longitudinal axis 'ofthe thimble and providing by its edges a follower or following surfacefor a spiral actuator. Through 20 this slot I5 y.and intothe. chamberkprovided by the thimble I3 below the bottom of the cutter I4 projectsthe upperend of the actuator which as herein shown may comprise astraight at bar having its upper end twistedinto the conilg- 25urationof a spiral.

The lower end of the tubular member I0 is closed by a .transverse iingerpiece II having'an v upwardly projecting hub of such diameter as to makea forcing ilrt with the member I0. In the 3Q top wall of the hub isprovided a transverse slot through .which passes the body of theplungerVI6 and'by which it is prevented from twisting.- As shown in Fig. 4 theplunger is encircled by a s compression spring I8 which bears at itsupper 35 end against a washer I1 perforated to permit the free .passageof the spiral section of the plunger and at its lower end against awasher 2| having a straight transverse slot therein for the plunger. Apin I9 is set transversely in the 40 vplunger between the lower washer2l and the ltop of the boss of the finger piece. This pin preventsremoval of the *plungerl from the device and also acts to carry thewasher ZI as the plunger is moved' inwardly or lupwardly so 45 that thespring I8` is compressed from expanded condition as shown i'n Fig. 3 tocontracted condition as shown in Fig.. 5. A thumb knob 20 is providedupon the outer end of the plunger I6.

vInoperatlon the user engages the knob 20 5o with his thumb and thefinger piece II with two lingers. By pressure on the knob 20 the plungeris forced inwardly to the position shown in Fig. 5 against thecompression of the spring I8 and in this movement the thimble I3 and thecutter Il 55 are rotated 90 in a counter-clockwise direction. When thepressureon the knob 2l is relaxed the sprring acts .to force the plungerdownwardly or outwardly and .the cutter Il is rotated in a clockwisedirection back to its initial position. This action may be kept up at arapid rate by the user so that the cutters are maintained in a state ofshearing movement and cutting or trim-` ming is effected wherever theoperative end of the device is directed and without tendency to pull theend of the cutter lto one side or the other.

The bevelled end of the .tubular member II acts to some extent as agauge to prevent the too deep insertion of the reduced projecting cutterI2 into a body cavity.

Having thus described my invention I claim as new and desire to secureby Letters Patent:

1. A cutting implement of .the class described including concentricrelatively rotatable shearing members. one of which hasan end providedwith a straight transverse slot, and a spiral actualtor movable throughAsaid slot in rotary drivin engagement therewith.

2. A cutting implement of .the class described including concentricshearing members, a rotatable thimble carrying one of said members.Droviding'a chamber beneath it and having a slot in its lower endextending transversely across the axis of rotation of the thimble. and aplunger having a spiral conilgm'ation movable through said slot and intothe chamber provided by the thimble while in rotary driving engagementwith the edges of the slot.

3. A cutting implement of .the class described comprising a tubularmember closed at one end and provided therein with a straight slot, atubular. cutter nxed in the other end of said member, a plunger having ailat sided section guided in said straight slot and a spiral inner endsection. and a rotary thimble mounted within said memberand having aslot extending transversely across its longitudinal axis to receive thespiral section of the plunger in rotary driving engagement.

4. Acutting 4implement comprising' an outer tubular cutter, an innerrotary tubular cutter having a transverse following surface. and a re`ciprocatory plunger held against rotation and having a spiral drivingsurface co-operating with the following surface of the rotary cutter torotate the same when the plunger is moved longi tudinally in theimplement.

JOSEPH MUROS.

